Pipe-covering.



G. A. RICHARDS.

PIPE GOVERING.

APPLICATION FILED FEB.7, 1911.

Patented Sept. 12, 1911.

M V2M-m @Momma UNITED sT-ATEs PATENT oEErcE.

GLENDQN A. RICHARDS, OF GRAND MICHIGAN.

RAPIDS, MICHIGAN, ASSIGNOR T0 RICHARDS- WILSON PIPE COVERING CO., 0FGRAND RAPIDS, MICHIGAN, A CORPORATION 0F PIPE-COVERING'.

Specification of Letters Patent. Patented Sept, 12, 19.11.

.Application led February 7, 1911. Serial No. `607,161.

To-fall whom it may concern:

Be it known that I, GLENDON A. RICHARDS, a citizen of the United Statesof America residing at Grand Rapids, in the county of 5 Kent and Stateof Michigan, have invented certain new and useful Improvements inPipe-Coverings; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will 10 enableothersskilled in the art to which it appertains to make and use thesame.

My invention relates to improvements in pipe coverings and its object isto provide a water-proof pipe covering having a heat insulating integrallining, and adapted to be laid under ground or in other exposed places,to provide a heat insulating lining spaced apart from the pipe leavingan `air space therebetween and to provide the device with various newand useful features hereinafter more fully described and particularlypointed out in the claims, reference being had to the which Figure l isa side elevation of a portion of a pipe covering embodying my invention;Fig.l 2 a longitudinal vertical section of the same; Fig. 3 an enlargedtransverse sectlon on the line 3 3 of Fig. 4; and Fig. 4 av detail inplan view of one endfof a lower section.

Like numbers refer the figures.

The puter casing orshell is composed of a longitudinally divided tile 12 preferably made of concrete and provided with an integral heatinsulating lining 3 in the axis of Awhich is a tubular passage in whichis supported the pipe to beprotected and insulated.

1 represents the lower half of the tile or shell and 2 the upper half ofthe same divided longitudinally in the plane of the axis and -having anexternal form of tile, said portions l and 2 being preferably made ofconcrete, and the interior provided with a heat insulating lining 3 ofmaterial adapted to unite integrally with the outer portions l and 2 andto be molded therewith and also to become inseparable therefrom, wherebythe lining is supported separate and spaced apart from the pipe and thedevice may be used without placing separate insulatin material withinthe outer casing and providing to like-parts in all of a special supportfor the same.

accompanying' drawings in the same in place.v The pipe 4 rests upon`these balls and moves readily thereon as the -pipe expands andcontracts. The lower portions 1 of this structure are provided withlongitudinal grooves 7 therein and the upper portions with tongues 8 vtoproject within the grooves and thus properly locate the portionsrelative to each other. The

tongue is of less dimension than the groove whereby a space therebetweenis left which in the finished structure is to be filled with cement orother material adapted to seal the joint and render the structurewater-proof.

I have found that a suitable heat insulating material that will adhereto the outer shellof concrete is preferably made of the followingingredients in the following proportions, by weight:

Anhydrous silica-or dry sand 25% Magnesium silicate-or asbestos 10%Portland cement 15% Calci sulphas exsiccatus-or calcined f plaster 80%Calcium oxid-or lime 20% This produces a very satisfactory insulatinglining that will readily adhere to the concrete outer portion or shelland can be readily molded therewith in suitable molds for the purpose. Ido not however, limit myself to the precise proportions or to the exactmaterials, it being only necessary to provide a suitable non-conductingmaterial .that can be molded with the concrete and that will adherethereto when the article is finished.

What I claim is 1. A pipe covering comprising an outer waterproof casedivided longitudinally and an integral lining of heat insulatingmaterial having an axial opening therethrough, and provided with agroove in one part and a tongue in the other part and pipe supports atintervals to support a pipein the axis of ward from the lining.

the opening and kspaced apart from the lining.

2. A pipe covering, comprising an outer tile-shaped case of ooneretedivided longitudinally and a heat insulating lining molded with the caseand integral therewith, and pipe supports at intervals projecting inwardfrom thev lining.

3. A pipe covering, comprising an outer tile-shaped case of concretedivided longitudinally and a heat insulating lining consisting of sand,asbestos, cement caloined plaster and lime, molded integrally with theconcrete case.

4. A pipe covering, comprising a waterproof tile-shaped case dividedlongit-udinally, an integral heat insulating lining and transverselydisposed rods projecting in- 5. A pipe covering, comprising a waterprooftile-shaped ease divided longitudi nally, a heat insulating liningintegral with the ease, transversely disposed curved rods projectinginward from the lining and arranged inl pairs, and balls between eachpair of rods to support a pipe.

6. A'pipe covering, comprising a divided tile-shaped outer case ofconcrete, a heat insulating lining molded with the case and integraltherewith, said case and lining provided with a tongue and groove spacedapart to receive cement therebetween, and inwardly projecting supportsfor a pipe to space the same apart from the lining.

In testimon whereof I aX my signature in presence o two Witnesses.lGLinvDoN itmonfnns. Witnesses:

LUTHER V. MoUL'roN,

HAROLD O. VAN ANTWERP.

